Hello Zaki,
If you can’t send or receive text messages (SMS), try the steps given on Lumia troubleshooting and repair. Select the following categories and perform the suggested steps provided. Under "What are you having a problem with?" choose Messaging > I cannot send or receive text messages.
After each step, check to see if your issue has been fixed. Make sure to select the next options given if the problem persists.
Feel free to post back if you need further assistance.
Regards.
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